title: Optical image encoding based on digital holographic recording on polarization state of vector wave.
abstract: We propose and analyze a compact optical image encoder based on the principle of digital holographic recording on the polarization state of a vector wave. The optical architecture is a Mach-Zehnder interferometer with in-line digital holographic recording mechanism. The original image is represented by distinct polarization states of elliptically polarized light. This state of polarization distribution is scrambled and then recorded by a two-step digital polarization holography method with random phase distributed reference wave. Introduction of a rotation key in the object arm and phase keys in the reference arm can achieve the randomization of plaintext. Statistical property of cyphertext is analyzed from confusion and diffusion point of view. Fault tolerance and key sensitivity of the proposed approach are also investigated. A chosen plaintext attack on the proposed algorithm exhibits its high security level. Simulation results that support the theoretical analysis are presented.
authors.forename: Chao
authors.initials: C
authors.lastname: Lin
authors.forename: Xueju
authors.initials: X
authors.lastname: Shen
authors.forename: Qinzu
authors.initials: Q
authors.lastname: Xu